What are these plastic caps on the end of these wires? Can I

CE-1 Plastic Closed End Crimp Caps Wire Connector White 18mm Length 200pcs

One wire broke, how can Ifix it? What wire do I need/how do I fit

Fix unreliable wire ends : r/vintageaudio

Hole Cap for 10mm LED Strip Light Bar

Fix unreliable wire ends : r/vintageaudio

Can I keep fixing wires with just electrical tape? : r/AskElectricians

Superior Electric CE-5 12-14 AWG Nylon Crimp Closed End Caps Wire Connectors - 25/Pack

How can I disable these LED lights on this circuit without

Tying multiple solid neutral wires to one single stranded wire : r

A guide to plastic end caps

How can I disable these LED lights on this circuit without